Creating a HTTPS request using Boost Asio and OpenSSL

Question

I have created a simple HTTP request wherein I am sending GET,POST and PUT requests to the server. Next I want to switch to HTTPS connection using boost asio library, how should I proceed?

I have an Executor Class that resolves and connects to the server and a RequestCreator Class that creates the request.

Answer 1

I happen to just have posted such a thing in a comment (...):

You just connect over ssl. @Milind coliru.stacked-crooked.com/a/9546326fd1def416

So perhaps it is helpful to you.

Live On Coliru

#include <boost/asio.hpp>
#include <boost/asio/ssl.hpp>
#include <iostream>

int main() {
    boost::system::error_code ec;
    using namespace boost::asio;

    // what we need
    io_service svc;
    ssl::context ctx(svc, ssl::context::method::sslv23_client);
    ssl::stream<ip::tcp::socket> ssock(svc, ctx);
    ssock.lowest_layer().connect({ {}, 8087 }); // http://localhost:8087 for test
    ssock.handshake(ssl::stream_base::handshake_type::client);

    // send request
    std::string request("GET /newGame?name=david HTTP/1.1\r\n\r\n");
    boost::asio::write(ssock, buffer(request));

    // read response
    std::string response;

    do {
        char buf[1024];
        size_t bytes_transferred = ssock.read_some(buffer(buf), ec);
        if (!ec) response.append(buf, buf + bytes_transferred);
    } while (!ec);

    // print and exit
    std::cout << "Response received: '" << response << "'\n";
}

To emulate a server for demo purposes I've been using the certificate and params from the Asio samples (https://stackoverflow.com/a/31201907/85371).

UPDATE Here's a version that uses resolver to resolve the endpoint (Coliru doesn't allow us to do that, but it does work on non-restricted machines).

Live On Coliru

ip::tcp::resolver resolver(svc);
auto it = resolver.resolve({"localhost", "8087"}); // http://localhost:8087 for test
boost::asio::connect(ssock.lowest_layer(), it);

// and the rest unaltered
ssock.handshake(ssl::stream_base::handshake_type::client);